{"id":4215,"date":"2023-04-28T18:50:19","date_gmt":"2023-04-28T13:20:19","guid":{"rendered":"https:\/\/aluminiummagazine.com\/mag\/?p=4215"},"modified":"2026-04-03T02:17:04","modified_gmt":"2026-04-02T20:47:04","slug":"comparing-shgc-and-u-factor-which-is-more-important-when-choosing-windows","status":"publish","type":"post","link":"https:\/\/aluminiummagazine.com\/mag\/efficiency\/comparing-shgc-and-u-factor-which-is-more-important-when-choosing-windows.html","title":{"rendered":"SHGC and U-Value of Windows and Doors for Optimal Energy Efficiency"},"content":{"rendered":"\n

The Solar Heat Gain Coefficient (SHGC<\/strong>) and U-Factor<\/strong>(U-Value) are two important metrics used to assess the performance of windows in terms of energy efficiency<\/a>. Let’s look at each of them:<\/p>\n\n\n\n

\"SHGC<\/figure>\n\n\n\n
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Solar Heat Gain Coefficient (SHGC)<\/strong><\/h2>\n\n\n\n

The SHGC is the fraction of solar radiation that enters a window and is released into the home as heat. It is expressed as a number between 0 and 1.<\/mark><\/strong> The lower the SHGC, the less solar heat is transmitted through the window, which is desirable in hot climates to reduce cooling costs. In colder climates, a higher SHGC may be beneficial to take advantage of solar heat gain during the winter. <\/p>\n\n\n\n

A low SHGC<\/strong> indicates that a window blocks more of the sun’s heat and is better suited for cooling-dominated climates.<\/td><\/tr>
A high SHGC<\/strong> indicates that a window allows more of the sun’s heat to pass through and is better suited for heating-dominated climates.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The SHGC<\/strong> is an important factor to consider when selecting windows for a building, as it can have a significant impact on energy use and indoor comfort. In addition to SHGC, other factors such as U-factor, visible transmittance, and air leakage should also be considered when selecting windows.<\/p>